The first step is you have to research some vehicle rental companies close to your location. Try to limit your research to three or four car rental companies nearby, and the limo service Miami is highly recommended.
Then, you should ask about the requirements needed to do the car rental. You have to ask about fuel, some car rental companies require fuel to be back as when you took the vehicle from the car rental company.
Furthermore, you should inquire about the delay in vehicle return. Along with the unconfirmed state of the road and recent congestion conditions make you sometimes cannot be on time, there are some car rental companies that can understand this situation so they compensate for one to two hours, but not a few car rental companies that require tenants returning the vehicle on time and providing additional hourly fees.
Then, ask about the insurance whether included for drivers and third parties. This is what you need so it will make you calmer but you have to stay careful on the road.
Finally, make sure you read the contract or rental agreement with the vehicle carefully, ask about things that you do not understand, it is intended that you are not played by a car rental company that naughty. Record the phone number of the car rental company that can be contacted at any time, it is useful if something happens to you during the trip.